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  Java Practices -> Use templates to standardize layout
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<div class='page-title'>Use templates to standardize layout</div>

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<br>Templates are commonly used to enforce a uniform appearance across
a set of related pages - often even for an entire web site.
<p>If using JSPs, templates can be easily implemented using either the
<tt>&lt;@include></tt>
directive or the <tt>&lt;jsp:include></tt> action.

<h4>Example</h4>

Here, a template JSP defines the layout. 
It includes a header, footer, and navigation links.
A <tt>&lt;jsp:include&gt;</tt> inserts the main content or "body" of the page. 
There are two parameters to the template, which are passed in as request parameters :
<ul>
<li><tt>TTitle</tt>, used in the <tt>&lt;title></tt> tag</li>
<li><tt>TBody</tt>, which is simply the name of the JSP which supplies all page content not otherwise defined
in the template.</li>
</ul>

The <tt>&lt;tags:xxx/&gt;</tt> items refer to <tt>.tag</tt> files, that contain small JSP snippets.

<PRE>
&lt;%@ include file="/JspHeader.jsp" %&gt;
&lt;
  !DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
  "http://www.w3.org/TR/html4/loose.dtd"
&gt; 
&lt;html&gt;
&lt;head&gt;
 &lt;meta http-equiv="Content-Type" content="text/html; charset=uTF-8"&gt;
 &lt;%-- TTitle is a request parameter for the templated page title. --%&gt;
 &lt;title&gt;
  Fish and Chips Club - ${param.TTitle} &lt;/title&gt;
 &lt;link rel="stylesheet" type="text/css" href="../../stylesheet.css" media="all"&gt;
&lt;/head&gt;

&lt;body&gt;
&lt;div align="center"&gt;
 &lt;img class="no-margin" src="../../images/logo.jpg" alt="Fish And Chips Club"&gt;
&lt;/div&gt;

&lt;div class="header"&gt;
 "The Total Fish & Chips Dining Experience"
&lt;/div&gt;

&lt;div class="menu-bar"&gt;
 &lt;w:highlightCurrentPage styleClass='highlight'&gt;
  &lt;c:url value="/main/home/HomePageAction.do" var="homeURL"/&gt; 
  &lt;A href='${homeURL}'&gt;Home&lt;/a&gt;
  &lt;c:url value="/main/rsvp/RsvpShow.do" var="showRsvpURL"/&gt; 
  &lt;A href='${showRsvpURL}'&gt;Rsvp&lt;/a&gt;
  &lt;c:url value="/all/logoff/LogoffAction.do" var="logoffURL"/&gt; 
  &lt;A href='${logoffURL}'&gt;Log Off&lt;/a&gt;
 &lt;/w:highlightCurrentPage&gt;
&lt;/div&gt;

&lt;%-- Display error and information messages. --%&gt;
&lt;tags:displayMessages/&gt;

&lt;%-- TBody is a request parameter for the templated page body. --%&gt;
&lt;div class="body"&gt;
 &lt;c:if test="${not empty param.TBody}"&gt;
  &lt;jsp:include page='${param.TBody}' flush="true"/&gt;
 &lt;/c:if&gt;
 &lt;c:if test="${empty param.TBody}"&gt;
  &lt;jsp:include page="Error.jsp" flush="true"/&gt;
 &lt;/c:if&gt;
&lt;/div&gt;

&lt;tags:footer/&gt;

&lt;/body&gt;
&lt;/html&gt;
</PRE>
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<div class='topic-section'>See Also :</div>
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  <a href='TopicAction1c49-2.html?Id=109'>Always maintain HttpSessions </a> <br>
 
  
  <a href='TopicAction159e-2.html?Id=175'>Prefer JSTL tags</a> <br>
 
  
  <a href='TopicActiond18f-2.html?Id=178'>Prevent self-linking</a> <br>
 
  
  <a href='TopicAction5f31-2.html?Id=188'>A Web App Framework - WEB4J</a> <br>
 
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